数据透视表数据源更改_excel数据透视表数据分析

小小码 • 2023-05-16 14:30 • 代码基础 • 阅读 109

大家好，我是考100分的小小码，祝大家学习进步，加薪顺利呀。今天说一说数据透视表数据源更改_excel数据透视表数据分析,希望您对编程的造诣更进一步.

SQL Server两表数据同步的几种方法

一、引言

A表数据同步至B表的场景很常见，比如一个公司有总部及分厂，它们使用相同的系统，只是账套不同。此时，一些基础数据如物料信息，只需要总部录入即可，然后间隔一定时间同步至分厂，避免了重复工作。

二、测试数据

CREATE TABLE StudentA
(
    ID VARCHAR(32),
    Name VARCHAR(20),
    Sex VARCHAR(10)
)
GO
INSERT INTO StudentA (ID,Name,Sex)
SELECT "1001","张三","男"
UNION
SELECT "1002","李四","男"
UNION
SELECT "1003","王五","女"
GO
CREATE TABLE StudentB
(
    ID VARCHAR(32),
    Name VARCHAR(20),
    Sex VARCHAR(10)
)
GO
INSERT INTO StudentB (ID,Name,Sex)
SELECT "1001","张三","女"
UNION
SELECT "1002","李四","女"
UNION
SELECT "1003","王五","女"
UNION
SELECT "1004","赵六","女"

三、数据同步方法

3.1、TRUNCATE TABLE

TRUNCATE TABLE dbo.StudentB
INSERT INTO dbo.StudentB SELECT * FROM dbo.StudentA

3.2、CHECKSUM

DELETE FROM dbo.StudentB WHERE NOT EXISTS (SELECT 1 FROM dbo.StudentA WHERE ID=dbo.StudentB.ID)

UPDATE B SET B.Name=A.Name,B.Sex=A.Sex
FROM dbo.StudentA A INNER JOIN dbo.StudentB B ON A.ID=B.ID
WHERE CHECKSUM(A.Name,A.Sex)<>CHECKSUM(B.Name,B.Sex)

INSERT INTO dbo.StudentB SELECT * FROM dbo.StudentA WHERE NOT EXISTS (SELECT 1 FROM dbo.StudentB WHERE ID=dbo.StudentA.ID)

3.3、MERGE INTO

MERGE INTO dbo.StudentB AS T USING dbo.StudentA AS S ON T.ID=S.ID
WHEN MATCHED THEN                --当ON条件成立时，更新数据。
    UPDATE SET T.Name=S.Name,T.Sex=S.Sex
WHEN NOT MATCHED THEN            --当源表数据不存在于目标表时，插入数据。
    INSERT VALUES (S.ID,S.Name,S.Sex)
WHEN NOT MATCHED BY SOURCE THEN  --当目标表数据不存在于源表时，删除数据。
    DELETE;